Return-Path: Received: from mtain-ma12.r1000.mx.aol.com (mtain-ma12.r1000.mx.aol.com [172.29.96.20]) by air-dc09.mail.aol.com (v129.4) with ESMTP id MAILINDC093-86554c95f2d2275; Sun, 19 Sep 2010 07:24:02 -0400 Received: from post.thorcom.com (unknown [195.171.43.25]) by mtain-ma12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1298838000073; Sun, 19 Sep 2010 07:23:59 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OxHyj-0004VA-Vf for rs_out_1@blacksheep.org; Sun, 19 Sep 2010 12:22:41 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OxHyZ-0004V1-HF for rsgb_lf_group@blacksheep.org; Sun, 19 Sep 2010 12:22:31 +0100 Received: from mail-iw0-f171.google.com ([209.85.214.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OxHyX-0003EZ-F7 for rsgb_lf_group@blacksheep.org; Sun, 19 Sep 2010 12:22:32 +0100 Received: by iwn42 with SMTP id 42so4057956iwn.16 for ; Sun, 19 Sep 2010 04:22:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=tfcq0Zf3ePUmImAW0bm+VcXtG1yD+BhKXQ/ycAe70q0=; b=tB9EyPo2E7ddbXB9yJfS/FgWHhylZAY8gEyfmixb0sAbSfIW7sCQMaI+FUZxEXyhiV zow3+OGiXyPwQVd/a6CTKCkIq0R2PwEzdzc3KJNOHzRiT2pHAuwCKXVTh5D9vZikAief GjUrLu1/cCyhC3V5I7svQw4ZNPrIXAHAAqnCU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=WbtG5bOwBNVbLT5Im4VlAnCM0NG071mkFx1ureS16+uOMIUvM58UL+T5/17We96Pgw 85AG8lWOEJfQCg21UVTbVyY3E9+duj7q08jVfSgXfpTEczyxrtUIWK82r9cl44ekG8qQ rWRLwFGyNqiSMeTrHkj0zDPXeCCo9jZRZNIjI= MIME-Version: 1.0 Received: by 10.231.166.210 with SMTP id n18mr8360412iby.167.1284895348371; Sun, 19 Sep 2010 04:22:28 -0700 (PDT) Received: by 10.231.145.145 with HTTP; Sun, 19 Sep 2010 04:22:28 -0700 (PDT) In-Reply-To: <4C95EEA4.20904@iup.uni-heidelberg.de> References: <4C95EEA4.20904@iup.uni-heidelberg.de> Date: Sun, 19 Sep 2010 12:22:28 +0100 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org, jfell@tesco.net, Julian@ygf.org.uk DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: WSPR Beacon -RIP Content-Type: multipart/alternative; boundary=0050450159dfd0310b04909b02d9 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m238.1 ; domain : googlemail.com DKIM : pass x-aol-sid: 3039ac1d60144c95f2cf0a88 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --0050450159dfd0310b04909b02d9 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable http://www.g4jnt.com/QRO_LF_DoesThis.JPG http://www.g4jnt.com/Melted_ATU_Cabin.JPG Not sure what started burning, but it was in the bottom corner by the look of things which is well away from the high voltage stuff at the top. The system ran for years using a plastic dustbin as the coil housing, even at 800 Watts occasionally. But from the way the shelf has melted, it look= s as if the plastic used in those B+Q sheds absorbs RF. Pity, it was going to house HF ATU Andy www.g4jnt.com 2010/9/19 Stefan Sch=E4fer > Andy, > > QRO can be an exciting adventure! :-) > > 73, GL, > > Stefan > > > > Am 19.09.2010 12:54, schrieb Andy Talbot: > > Well, it was nice while it lasted. Went downstairs and smelt smoke. > Heard a crackling noise coming from the plastic "shed" housing the ATU= . > Opened the door, saw flames and melted plastic. > > Two buckets of water before they were extinguished - plastic B+Q sheds= burn > very well > > Goodbye antenna tuning cabin :-( > > The loading coil and antenna survived. My credibiilty didn't :-( > > Pictures will follow > > Andy > www.g4jnt.com > > > On 19 September 2010 11:44, Andy Talbot wrot= e: > >> Sinece theere were no reports of my QRP WSPR beacon last night two >> conclusions can be drawn : >> >> a) No One was listening >> b) Its too weak. >> >> To resolve a) ...... ?? Not a lot I can do apart from post this mess= age >> :-( >> >> But to resolve b), I've now fired up the big switchmode PA >> http://www.g4jnt.com/137tx.pdf >> Generating about 600 Watts this will increase ERP into the region of >> 17dBm >> (The WSPR message says 13dBm, but its lying. I've already run up and >> downstairs with the PIC programmer, and don't want to do it again) >> >> >> >> >> Andy >> www.g4jnt.com >> > > --0050450159dfd0310b04909b02d9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Not sure what started burning, but it was in the bottom corner by the= look of things which is well away from the=A0high voltage stuff at the to= p.=A0=A0
=A0
The system ran for years using a plastic dustbin as the coil housing,= even at 800 Watts occasionally.=A0 But from the way the shelf has melted,= it looks as if the plastic used in those B+Q sheds absorbs RF.=A0=A0 Pity= , it was going to house HF ATU
=A0
=A0
2010/9/19 Stefan Sch=E4fer &l= t;schaefer@iup.uni-heide= lberg.de>
Andy,

QRO can be an exci= ting adventure! :-)

73, GL,

Stefan



Am 19.09.2= 010 12:54, schrieb Andy Talbot:=20
Well, it was nice while it lasted.=A0 Went downstairs and smelt smoke= .=A0=A0 Heard a crackling noise coming from the plastic "shed"= housing the ATU .=A0=A0 Opened the door, saw flames and melted plastic.
=A0
Two buckets of water before they were extinguished - plastic B+Q shed= s burn very well
=A0
Goodbye antenna tuning cabin :-(
=A0
The loading coil and antenna survived.=A0=A0 My credibiilty didn'= t=A0 :-(
=A0
Pictures will follow
On 19 September 2010 11:44, Andy Talbot <andy.g4jnt@googlemail.com> wrote:
Sinece theere were no reports of my QRP WSPR beacon last night two co= nclusions can be drawn :
=A0
a)=A0=A0 No One was listening
b)=A0=A0 Its too weak.
=A0
To resolve=A0=A0 a) ...... ??=A0 Not a lot I can do apart from post= this message :-(
=A0
But to resolve b), I've now fired up the big switchmode PA=A0=A0= http://www.g= 4jnt.com/137tx.pdf=A0=A0=A0=A0=A0=A0
Generating about=A0600 Watts this will increase ERP into the region= of=A0 17dBm
(The WSPR message says 13dBm, but its lying.=A0I've already run= up and downstairs with the PIC programmer, and don't want to do it ag= ain)
=A0
=A0
=A0


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